diff --git a/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index 8a67fe4d9b..d7c9edf8e6 100644
--- a/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 66d07c9dd9..375de4ebe0 100644
--- a/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index 8a67fe4d9b..d7c9edf8e6 100644
--- a/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 66d07c9dd9..375de4ebe0 100644
--- a/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index 8a67fe4d9b..d7c9edf8e6 100644
--- a/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 66d07c9dd9..375de4ebe0 100644
--- a/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index 8a67fe4d9b..d7c9edf8e6 100644
--- a/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 6f1f5c69b0..b46dba3f45 100644
--- a/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a634c4de3f..75b99c65a8 100644
--- a/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 6f1f5c69b0..b46dba3f45 100644
--- a/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a634c4de3f..75b99c65a8 100644
--- a/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 6f1f5c69b0..b46dba3f45 100644
--- a/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a634c4de3f..75b99c65a8 100644
--- a/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 6f1f5c69b0..b46dba3f45 100644
--- a/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index 8a67fe4d9b..d7c9edf8e6 100644
--- a/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index cf3f91dd4b..7babfca556 100644
--- a/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a0ec2cd37f..90f2aca9d6 100644
--- a/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 2dda7789dd..31448aae9a 100644
--- a/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a0ec2cd37f..90f2aca9d6 100644
--- a/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 2dda7789dd..31448aae9a 100644
--- a/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a0ec2cd37f..90f2aca9d6 100644
--- a/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 2dda7789dd..31448aae9a 100644
--- a/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a0ec2cd37f..90f2aca9d6 100644
--- a/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index fb15061244..40af22258f 100644
--- a/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -944,10 +944,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a0ec2cd37f..90f2aca9d6 100644
--- a/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index fb15061244..40af22258f 100644
--- a/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -944,10 +944,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a0ec2cd37f..90f2aca9d6 100644
--- a/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index fb15061244..40af22258f 100644
--- a/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -944,10 +944,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}
diff --git a/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java b/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
index a0ec2cd37f..90f2aca9d6 100644
--- a/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
+++ b/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/skills/SkillCaster.java
@@ -251,7 +251,7 @@ public class SkillCaster implements Runnable
 		int reuseDelay = caster.getStat().getReuseTime(_skill);
 		if (reuseDelay > 10)
 		{
-			if (Formulas.calcSkillMastery(caster, _skill) && !(_skill.getReferenceItemId() > 0))
+			if (Formulas.calcSkillMastery(caster, _skill))
 			{
 				reuseDelay = 100;
 				caster.sendPacket(SystemMessageId.A_SKILL_IS_READY_TO_BE_USED_AGAIN);
diff --git a/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/stats/Formulas.java b/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/stats/Formulas.java
index 2dda7789dd..31448aae9a 100644
--- a/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/stats/Formulas.java
+++ b/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/stats/Formulas.java
@@ -943,10 +943,20 @@ public class Formulas
 		return false;
 	}
 	
-	public static boolean calcSkillMastery(Creature actor, Skill sk)
+	public static boolean calcSkillMastery(Creature actor, Skill skill)
 	{
-		// Static Skills are not affected by Skill Mastery.
-		if (sk.isStatic() || !actor.isPlayer())
+		// Non players are not affected by Skill Mastery.
+		if (!actor.isPlayer())
+		{
+			return false;
+		}
+		// Static skills are not affected by Skill Mastery.
+		if (skill.isStatic())
+		{
+			return false;
+		}
+		// Item skills are not affected by Skill Mastery.
+		if (skill.getReferenceItemId() > 0)
 		{
 			return false;
 		}